create tests for signals

packages/signals/tests/create.rs

@@ -0,0 +1,60 @@
+#![allow(unused, non_upper_case_globals, non_snake_case)]
+
+use dioxus::prelude::*;
+use dioxus_core::ElementId;
+use dioxus_signals::*;
+
+#[test]
+fn create_signals_global() {
+    let mut dom = VirtualDom::new(|cx| {
+        render! {
+            for _ in 0..10 {
+                Child {}
+            }
+        }
+    });
+
+    fn Child(cx: Scope) -> Element {
+        let signal = create_without_cx();
+
+        render! {
+            "{signal}"
+        }
+    }
+
+    let _edits = dom.rebuild().santize();
+
+    fn create_without_cx() -> Signal<String> {
+        Signal::new("hello world".to_string())
+    }
+}
+
+#[test]
+fn drop_signals() {
+    let mut dom = VirtualDom::new(|cx| {
+        let generation = cx.generation();
+
+        let count = if generation % 2 == 0 { 10 } else { 0 };
+        render! {
+            for _ in 0..count {
+                Child {}
+            }
+        }
+    });
+
+    fn Child(cx: Scope) -> Element {
+        let signal = create_without_cx();
+
+        render! {
+            "{signal}"
+        }
+    }
+
+    let _ = dom.rebuild().santize();
+    dom.mark_dirty(ScopeId(0));
+    dom.render_immediate();
+
+    fn create_without_cx() -> Signal<String> {
+        Signal::new("hello world".to_string())
+    }
+}